SHO KOI IMPACT 2-LB PONDMASTER: SHO KOI IMPACT 2-LB $16.99 SKU: SUP55120 QTY: Click here to save 5% off of your order! PONDMASTER SHO KOI IMPACT/SHO GOLD SINKING FOODS 2 LB Sho Gold Fish Food is the only gold fish food with Optimun, a biogenic performance enhancer, for rapid immune response to disease causing organisms. Contains no artificial coloring or dyes.